Calculating-machine.



J. F. MAYS. CALCULATING MACHINE. APPLICATION FILED MAR. 19. 1914.

Patented Ma1227, 1917 H SHEETS-SHEET 1.

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Jana QQEM J. F. MAYS.

CALCULATING MACHINE.

' APPLICATION FILED mm. I9. I914.

Patented Mar. 27,1917.

H SHEETS-SHEET 2- J. F. MAYS.

CALCULATING MACHINE.

APPLICATION FILED MAR. 19. I914.

1,220,665. Patented Mar. 27, 1917.

H SHEETS-SHEET 3- mi Niall" w T2212- 4, mum? I [54 L 2 1 O 9 3 76fJzme-SIC'M S, wanna I4 6 78 9 0 1 251" .I. F. MAYS.

CALCULATING MACHINE,

APPLICATION FILED MAR. 19. I914- luon W01 @wwsFMays,

wi bmeoow Patented Mar. 27, 1917.

I I SHEETS--SHEET 4.

J. F. MAYS.

CALCULATING MACHINE. APPLICATION FILED MAR. is. 1914.

Patented Mar: 27, 1917 ll SHEETS-SHEET 5.

TIE-v.15-

17:; 21mm; I?

swoon WM 7 7/68 E C 1637s,

wi hwooeo -J. F. MAYS.

CALCULATING MACHiNE.

APPLICATION FILED MAR. 19. I914.

Patented Mar. 27, 1917.

H SHEETS-SHEET 6- J. F. MAYS.

CALCULATING MACHl-NE. APPLICATION FILED MAR. 19. 1914.

1220,665. Patented M31227, 1917.

II SHEETS-SHEET 7.

* eme @QQ luon WM ale trues Fa/ ys,

1. F. M AYS. CALCULATING MACHINE.

APPLICATEON FILED MAR. 19. I914- 1,220,665. Patented Mar. 27,1917.

1] SHEETS-SHEET 8 J'. F. MAYS.

CALCULATING MACHINE.

APPLlCATlON FILED MAR. 19, 1914.

1,220,665 Patented Mar. 27, 1917.

ll SHEETS-SHEET 9.

EEEZLE amumdoz (IO/77188 1. M a g-s, q mkwoooao Mia mm J. F. MAYS.

CALCULATING MACHINE.

APPLlCATlON FILED MARJQ. 1914.

Patented Mar. 27, 1917.

1 1 SHEETS-SHEET 10- Jvme FMa s,

awwutom l l I 1 l l I l l l I X l I I l 1 I I J. F. MAYS.

CALCULAUNG MACHINE.

APPLICATION HLEn'MAR. 19, 1914.

Patented Mar. 271917.

H SHEETS-SHEET .1.

Erna-E]- James 172421 8,

a setting and relocking them after resetting;

it provides auxiliary Patented Mar. 27, 1917.

Havana.

1,220,665, Specification of Letters Patent.

Application filed March 19, 1914. Serial No. 825,876. To alljohom it mayconcern: v I Be it known that I, JAMES F. Mars, a citizen of the Unitedily used with thereof-- before on a calculating am 4 aware;

-whereby the a State of Alabama,

operation, light 15 i States, residing at Birmlngham, in the county ofJefferson and have invented certain new and useful Improvements inCalculating-Machines, of which the following is a specification,

This invention has for its objects broadly the production'of acalculating machine capable of performing arithmetical operations in thesimplest and most direct manner; which shall be dependable and accuratein and portable in character,

and simple. in'oonstruction'; which shall be capable of- .operation. bya. comparatively light finger touch, and'which shall be reada typewriteror independently With the foregoing general objects in view, thisinvention embodies a keyboard and registering dial arrangement wherebythe operations of particularly may be performed in a very much moredirect and simple way than ever it embodies novel mechanism operation ofregistering dials is effected in a direct and sim le manner anderationfrom their respective keys and in carrying is positivelyprevented; it provides a novel resetting mechanism and means forpreventing overthrow of the dials 1n resetting, and means to unlock thedials for reor floating dials for I the purpose of registering totals orverifying results of operations of other dials; it provides means forpreventingv the accidental displacement of' said floating dials when setfree; it provides a series of dial shaft units eachcomprising arotatable dial operating shaft, one or more registering dlals thereon,and car ing mechanism individual to'each of saiii shafts, each of saldunits being separately. machine; it also nism of the respective dialoperating shafts scription reference subtraction anddivision machine asfar as I ring the relative bers on these dials; I

Fig. 9, a fragmentary detail elevation liftable out of theprovides anovel arrangejment for supporting the carrying mecha-- I free from theweight and friction of such. mechanlsm, and

4 e arrangement with respect to the floating dials,

' following detail description of a specific em bodiment of the saidinvention, in which dewill be had to the accompanying drawings wherein:

igure 1, represents a top plan view ofthe calculating machine detachedfrom a typewriter;

Fig. 2, a vertical'section taken through that portion of the the llne2"'-2 Fig. 7, looking from front to rear of the machine;

Fig. 3, a longitudinal vertical section of the machine shown in Fig. 1,casing removed, and on a larger 'scale than Fig. 1'

4, a fragmentary detail section of the tension mechanism for the master'rock shafts;

Fig. 5, a fragmentary in section and partly in top plan, showing thearrangement for guiding the upper portions of. the keystems;

Fig. 6, an enlarged fragmentary detail top plan View of "portions of thedial shaft actuating and carrying mechanism;

Fig. 7, a fragmentary section on line 7 *7" Fig. 3,1ooking down;

, 1 1g. 8, represents in development one of the addition dials, one ofthe floating dials, and oneof the complementary dials, showpartly' insection, of the gearing connecting the several dial shafts with thecarrying mechanism of the dial shaft ofthe next higher denomination, fortensioning the motion impelling elements of the respective carryingmechanisms;

." Fig. 10, .a detail sectional elevation of the mechanism forrestraining. and releasing the carrying mechanlsms o shafts,

machine indicated by detail view partly I the respective dial Fig. 11, afragmentary detail sectional eleand it also pro- -vides a novelmechanism for the operation 0 7o with the outer arrangement of thehumvation primarily to show the mechanism for preventing overthrow ofthe dial shafts when operated by their respective keys;

Fig. 12, detail sectional elevation of the overthrow, locking and'lockreleasing mechanism of the carrying mechanism for a given dial shaft;

Fig. 13,21. detail perspective view of the locking leverv shown in Fig.12;

Fig. 14, a side elevation Of! the machine shown in Fig- 1, with aportion of one corner broken away; Fig. 15,.a detail sectional elevationshowing the coupling operating leverof the reset mechanism, togetherwith 'related parts; Fig. 16, a fragmentary detail section on line 16 16Fig. 15, and showing in top plan a. portion of the lock operating mechajsection taken on line 521 121 lower portion of the t nism controlled bythe lever shown in Fig. 15;

Figs. 17, 18 and 19, are fragmentary detail sections taken on lines 17'-17 lik -18 and 192-19, Fig. 15;

Fig. v through the handle of the reset lever;

Fig. 21, an' enlarged'fragmentary. detail Fig. 3, looking toward thefront of the machine 5- l Figs. 22 and 23, fragmentary detail sectionalelevations of portions of the dial shaft locking and releasing mechanismoperated in connection with resetting the dials; Fig.2t, a fragmentarydetail'section. on line QAL -Ql Fig. 21, looking down; Fig. 25, a detailsectional elevation, show- "ing the arrangement of the spring againstwhich the reset operating shaft shown in Figs. 22 and 23islocated;

Figs. 26 to 33; -inclusive, vision counter or quotient registeringmechilg. 34, a front elevation showing the-caL culating machine coupledto a typewriter; Figs. 35 and 36, detail views of the mechanism forholding the typewriter and calculating machine in proper alinement;

' the inner casing of the calculatingma'chine,

tion between the key. stems and the type 6 levers, aswell with manyparts removed, to show the rela-v umns may be employed.

fsponding approximately to 20,: a detail longitudinal section j detailsof the di- 37, looking to the left, withthe lower.

the way ofsupp'orting the shiftable frame carrying said shafts-andlevers.

The machine here shown compri r-- a long other parts, aseries of columnskeys 1, l'iavii'ig finger tips upon which appear the digits representedby the respective keys according to the usual practice in machines ofthis class. lnthe accompany lng drawings seven columns of these keys areshown, but any desired Each key is provided-with a stem 2 cons stmgpreferably of a flat metal bar of rectangular cross-section. These keysare mounted for vertical reciprocating motion,

number of col 3 and for the purpose oflholding their stems i inanupright position and guiding their vertical movement there is providedfor each column'of lgeys a guide plate 3 having a series of open endslots & of a depth correthe width of the key stems, and each of theseslots receives an individualkey stem vertically movable therein. The keystems areretained within slots 4t by, plates 5. Plates 3 and 5 areremovaloly secured,'."-as by screws 6, to the frame of the machine asshown. in Figs. 3

The key stems are guided below by a plate 7 fast to the machine frameand having openings through which the individual key stems'extend.

Each key is at all-:times under tension lupward' of an individual coilspring 8 attached "at one end tothe key stem, and :at its other end tothe .plateS through which the key stempas'ses. The upward travel ofeachkey is A engaging that one of the plates 3 through which the stempasses.

dividua-l. master rock shaft 10 extending through andjournaled forrotation in two supports ll and 12Jwhich are made fast t'o the sides13"and 14 of a casing having'ends limited by a stop 9 on its stem I Foreach column of keys,- there man 111-- o 15 and 16. This casing isrec'tangularin horizontal cross-section, and constitutes 'what may becalled the main frame ofthe Inachine. An outer casing fits over thisinner casing-or frame and will loo-described in greater detail later. Y

The sides and endsof the inner casing or frame may be made integral witheach other, hutthe supports Hand 12 :are preferably removablyattached byscrews'or' otherwise to the sides 13 audit. 5.

'"T'fltach shaft- 10 is rotatable oil-it's longi{ tudinal axis by any ofthe keys of'its corresponding colilmn, parted. to said shafts by saidmotion being imthe engagement of gear. teeth 1? on the-several keystems, with mdifldual e pe' is, fast on the rock lley's 1, are allintendedjto travel d w istance whenmperated, but each Y dialsthree-tenths of engage with their sectors 18 key in a given column mustrotate its shaft 10 a different amount in order to properly actuatelcertain number bearing, dials hereinafter more particularly described. Inother words, the '1 keys must turn their dials 10 one-tenth of arevolution;'the. 2 keys must turn the same dials two-tenths of arevolution; the 3 keys must turn said a revolution, and so on.

This is effected by the proper location of the teeth 17 on the severalkey-stems so as to at the proper time. -In Fig. 11 a 3 which case thekey stem has three" gear teeth so located as to commence to engage withsector 18 when the key tenths of its travel down.

The zero keys of the calculating machine are merely for the purpose ofprinting zero on a typewriter, as hereinafter described, and have noconnection with the rock shafts 1.0. v

.Each of said rock shafts is rotated, as described, against thetensionof an individual spiral spring 19 fast at one end to the shaft,

and at its other end to a'ratchet 20 recessed to receive said spring.(See Fig. 4.)

'justing the angular These ratchets are each normally held againstrotation by a pawl 21 pivoted on supporting bar 12. The tension ofspring 19 may therefore be readily adjusted by adosition of the ratchets20. The end 16 of the inner casing is made low to permit ready access tothe ratchets.

For each rock shaft 10 there is a corresponding dial shaft 22 operatedthereby. In t e accompanying drawings, of these dial shafts are shown,it being understood that in actual practice in this machine there wouldbe seven such shafts, or as many as there are columns of keys.

The shaft 23 is an extra dial shaft provided for purposes which willhereinafter more fully appear. a

.All of these dial shaftsrest at their opposite ends in bearings in theend 15 of the inclusive, said numbers on the several dials inner casingor frame,.and in a plate .or bar 2 1 made fast to supportin plate 11.Parts 15 and 24, however, form iearings for only the lower half of saidshafts, the upper half of said bearings being formed by two bars 25and26 screwedto the top of. the portion 15 of the machine frame andtothe top of the supporting bar 24, respectively. (See Fig. 3). This formof bearing is provided to permit the dial shafts, together with theparts carried thereby, to be readily removed separately as units forrepairs or for replacement by other dial shaft'units. Y

Eachiof the dial shafts 22 carries two number dials 27 and 28 fastthereon. Dials 27 constitute the regular adding and multiplying dialsand each has upon its periphery a similar series of numbers from zero to9 key is shown, in.

has reached six- 7 plementary dials.

" dial shaft 29 the dial shafts.

27 occupying corresponding angular posi-] tions accordmg to the usualpractice in dial indicating adding or calculating machines. 'Dials 28constitute division and subtrac tion dials and each bears upon itsperipheryfi numbers from zero to 9 inclusive, but these are incomplementary is to say, for each number on a dial 27, the

complement of that number on the basis 28 in development.

.In the following description, for convenience, dials 28 will'bereferred. to as 'comarrangement with re-,, spect to the numbers on thedials 27. That Inaddition to the above mentioned dials there is provideda set of auxiliary or floating dials 29, one for each shaft 22-, andthese jdials,.while being rotatable by said shafts are not actuallymounted thereon in the sense of bein supported thereby. Each asan-elongated sleeve hub 30 which is rotatable in a bearing 31 car riedby a shifting bar 32 whichis movable,

as hereinafter described, longitudinally of The 'dia-l shafts assthrough the sleeve hubs of dials 29, but-do not touch them, therebyrelieving said shaftsof all friction due to engagement with said dials.as wellalso as the weight .ofthe dials themselves.

As shown, these auxiliary dials 29 are provided primarily for thepurpose of verifying an amount thathas been printed on atypewriter'through the operation of the calculating machine keys, thoughtheymay be used for totaling or any other desired purpose. Broadly theirpurpose may be stated as that of re istering a result obtained-on theother ials, and holding this result while the calculating machine keysare being operated to obtain another result or record in printing theamount registered on said auxiliary dials. A specific operation will begone throng later on in this description, involving these auxiliarydials, when the function and utility will be more apparent. Bearings 31are flattened on' two side (see Fig. 2) to fit square openings 33 in theshifting bar 32, and this bar 1s provided with a section 34 normallyholding bearings 30 in place, but which mabe removed to permitlifting'the dial shas together with the parts carried thereby 'out of themachine separately,

Shifting bar 32 is supported at its ends upon flan s 35 and 36, on thesides of the machinefigme, engaging guide slots in the ends of'bar 32.

The operation of dials 29 and the mechanism .for' shifting bar '32longitudinally of the dial shafts for the purpose of con- Fast adaptedto mesh respectively vv1th pinions "38, however, are not positively.eenneetedto"the dial shafts, but are connected'theretothroughlclntehes," eaeh coina fastfte or ermed on the pinion'sSS, and-amemher l9 fast to its dial ilheseehitch nie'mhers are con pled hylmeansof a spring'pavvl ll" on the member: 39 engaging. teeth 42 on member so.{See 6.). Through this gearing and son ling-rotation is imparted-to thedial aha ts from their? respeetive rock shafts 10.

'Fon'eachrockshaft 10 there is a supple,- mentary'or {auxiliary-rockshaft 43 extendiugparallelthereto'and journaledat one fwd .inythe.end--16 of the machine" frame, I [and at the; other end in "a bar 43-extendtransversely across the machine and se fenrhelatit's ends to hesides 13 and-1e of the inaehineframe. Each of'jthese auxiliary (919Tshafts carries a series of arms 44, each aged to extend into the. pathof a pin filearried hyeach key stem. The pins e5 7 are so located thatthey will engage arms set before the keysreaeh the lower limit ef' theirtravel, and as the keys continue their travel downward, said pins willcause the arms 4% to rock their shafts 43. @n'e of this rocking ofshafts 4:3 is to pre- X overthrow of the dial "shafts in the Where theyare'lrey operated as distinj ,froinoperation by the carryingreeehanism,"and this is eflected by the pas sage ofthe upper end of eachof, a series o stop levers 4:6 (see Fig. 11), into posi- 1 to he engagedby the teeth of a stop 1 tehet'tfi' one of which ratchets is fast on Ieach oat-the dial shafts22. There is a stop lever 46 fasten each of theauxiliary shafts ehand each of these shafts is under the tension of aspring 43* normally pulling arms it? against stopse-GE' (See Fig 11.)"For the purpose of effecting carrying from one'dial shaft another, thefollow ing mechanism is provided: For each dial 7 shaft. except theunits dial shaft or the first one on the right in Fil 7, there isprovided a'gear 48 Which is rotatable on a sleeve 49 removaloly mountedbut normally held fast as hereinafter described in a si pporting har 5Qmade fastat its opposite-ends to the sides of the frame of the machine.llaoh sleeve 4:9 is

provided 'vvith a section flattened on two I of the dial shafts incarry1ng,there'1s mount sidesto fit-into a square opening 51 in bar (seeFig.9), said sleeve being held firmly in, said openings by a removablebar 52 screwed upon the top of supporting her 50. Sleeve hearings 4:?)may therefore he lifted out of maehinetogether with the parts whichcarry.

d willjhe taken clearly in Fig-. 7.

I The dial shafts pass through central openin sleeve ll), but do nottouch them,

thereby relieving said shafts of the friction v of these sleeves as wellas the weight of them and the parts carried thereby.

'i-rlso mounted-to rotate on each sleeve 49 18 a carrying ratchet 53,and each of these 'atohetsis connected to a gear 48 on the same sleevei9 therewith through a spiral spring elconnectedat one end to theratchet, and at the other end to the said gear as shownmost Rotation 1simparted from each carrying ratchet to its dial shaftthrough a clutchshafts fast in supporting-bar 50.

Pinions 58 are driven by gears 60, which 111 turn mesh, with pinions 61fast on each of. the dial shafts. By means of this train of gearing,springs are wound up a certain amount on each forward rot'ationof any ofthe dial shafts. Said springs are, however, always under a certainamount of tension.

Gears 48 to 61 are so proportioned that it requires one full remlutionof given shaft 22 to impart of a revolution to the shaft of' the nexthigher denomination.

Thesesprings at all times tend to rotate the dial shafts, except theunits dial shaft, in a forward direction, but are normally pre ventedfrom doing so by holding pawls 62 (see Fig. 10) one of which is providedfor each carrying ratchet 53, the said pawls being fulcrumed on across-bar 63made fast at its opposite ends to the sides of the machineframe. v

These holding pawls jare normally pulled hack each against a stop pin.64: by a light spring 65, and are tripped at the proper tune to releasetheir carrying ratchets, each by a pin 66 carried'on each of the dialshafts 22 next on the right, and of a lower denomination of units. Pins66 trip the holding pawls 62 between nine-tenths and a completerevolution of the dial shaft next'on the right thereby releasing thecarrying ratchet and allowingits dial shaft to rotateoneystep or carryonei. Immediately after any stop pawl 62 is tripped, it returns tonormal un der the action of its spring 65 and stops its carrying ratchetat the end of onestep. For the purpose of preventing overthrow ed faston each. such shaft, except the uni s dial shaft, a stop ratchet 67 andadapted to cooperate with each of a stop lever 68 ofpecnliarconstruction.

Each lever. 681s fast onan individualsleeve 69,'and one ofthese sleevesrisincunt;

these stop ratchets is on each of the supplemen- (See Fig. 3). c

levers 68 may be best 70 having a nose 71 adapted to engage the teeth ofstop ratchet 67 and yieldable down- .ward against the tension of aspring 72. The movement .of pawl 70 onits pivot in a clockwisedirection, ig. 12, is limited by a shoulder on said pawl engaging ashoulprovided with an off-set adapted to coiipera'te, as hereinafterde-, scr bed,'with a cam 76 on the next dialshaft .22 on the right ofthe one carrying the stop pawl 67 with which a given pawl 70 00-operates.

Each stop lever 68 is at all times under tensiontoward its stop ratchetof an in :-dividual spring 77, its movement in said di frection beinglimited by sleeve 69, engaging with aceof intermittent gear =25 an arm78 fast .on a cam 79 n one 37.

When any dial shaft 22 is in the normal or zero position, its cam 76will occupy the position shown inFig. 12. I

. As a given dial shaft 22 rotates'either by the operation of itscorresponding keys or .by the carrying operation from the next dialshaft on the right, its cam 76 will r0 tate with it in the direction ofthe arrow Fig. 12. In thus rotating, cam 76 acts upon lip 75 to rotatearm 68 away from ratchet 67, thus removing nose 71 from the path of theteeth of ratchet 67 in time to allow shaft 22, on which said ratchet isfast, to rotate in performing the carrying operation. Qams 76, however,are so shaped and adjusted on their shafts that immediately before thecarrying operation is performed from its shaft 22 to the next one on theleft, the drop of cam 76 will pass lip 75, allowing to return quickly tothe path of the teeth of ratchet 67 under the pull of spring 77. Whennose 71 is thus returned and before ratchet 67 starts to rotate in thedirection of its arrow (Fig. 12) to perform the carrying operation,shoulder 73 of pawl 70 will be in engagement with shoulder 74, and nose71 will be in its up or :raised position. Then, when ratchet 67 rotatesin the direction of its arrow (Fig. 12) to carrying, a tooth of saidratchet will strike nose 71, but said .nose will yield downward until itstrikes-stop shoulder 74 on arm 68, when the movement of ratchet 67 willbe positively stopped. If nose 71 did; not yield as described, it wouldbe impossible to insert said nose into the path of the teeth of the stopratchet and at the same time allow ratchet 67 to rotate one-tenth of arevolution. The parts are so arranged that the noses 71 make positivecontact with their respective} shoulders 74 13. Each of these.

' through the operation of v precisely at the end of one-tenth of arevolution of the dial sh fts "L ever 78 and cam 79, while above men toned merely as stops for lever 68, vided primarily for the purpose ofwithdrawing noses 71 from ratchet 67 when the dial shafts of thoseratchets are operated directly by their own keys, ascontra-distinguished from. the carrying operation. In the former casewhenever rock shaft 10 are prois rotated by any of its keys, thisrotates gear 37 counter-clockwise (Fig. '12). This in turncauses cam 7 9to force the upper end of lever 78 to the right, and as this lever isfast on sleeve 69 with arm 68, the latter will be rotated in'a clockwisedirection Fig. 12, thereby'removing nose 71- from ratchet 67.Intermittent gears 37 and 38 ,IS provided means for coupling dials 29 totheir respective dial shafts, and uncoupling them from said shafts, atwill. Such means comprises, in the machine here shown, a clutch for eachdial 29, consisting of a series of teeth 80 on the sleeve hub of suchdial, and a series of teeth 81 on the hub of the dial 28 on the sameshaft therewith. These teeth are coupled and uncoupledby the shifting ofbar- 32, and this is effected ing a bifurcatedupper end 83 adapted toengage opposite sides of bar 32, said lever being fast on a rock shaft'84, operable by a are so ar-- ranged thatthey do not intermesh untilcam levers 82, each havlever 85 fast thereon and located outside of ythe side 13 of Figs. 1 and 2).

' For the purpose of retaining the totaling dials against accidental ornot, intended. angular displacement when they are uncoupled from dials28, I'provide a holding device (see Figs. 21 and 24) which comprises ashiftable'plate 86 having a series of down turned lips or wings 87 eachcarrying a shoe 88 of felt material which is at times automaticallymoved into engagement with the dials 29 to hold them against rotation.This plate 86 rests upon the upper edge of bar 34 and is guided forlongitudinal movement by pins 89 on said bar engaging slots 90 in saidplate, there being one such pin and slot near each end of plate 86.Plate 86 is at all times under tension of a spring 91 tending to pull itto the left (Fig. 24) or in such direction as to remove shoes 88 fromthe dials.

the machine frame. (See Motion is imparted to plate 86 in the direcorother suitable friction bevel 92 on one end of plate 86 with a bevel 93on the side of the'machine. When plate the 'pinions longitudinally ofthe 86 is shifted in the opposite direction, shoes 88 are removed fromthe dials 29 under the action of spring 91. For the purpose of resettingthe dials to normal, the fbllowing mechanism is provided, (see Figs. 2,3, 7 and 21) On-each loose to bothslide longitudinally and rotatethereon. Fast to each of these pinions are two disks 95 and 96 providedrespectively with arms 97 and 98. These arms are adapted to engagerespectivelywith studs 99 and 100on disks 29 and 27 on the same shafttherewith, and through the coupling thus afforded either of these disksmay be rotated by the rotation-of a pinion.

94. Normally, however, botharms 97 and 98 are disconnected from thedisks, as shown in Fig. 3, but may be brought into opera-.- tionrelative therewith by theshifting of. dial shafts as hereinafterdescribed. I

All of the pinions 94 mesh with a rack 1.01 mounted upon shoulder screws102 car-' ried by permit longitudinal motion thereof. Bar 103 isprovided at its opposlte ends with right angle extensions 105 "and 106,

each having a slot orguide-way engaging with elongated lugs o'r'respectively, on the sides of the machine frame, said flanges supportingsaid bar for a link 112 to a hand operated lever 113 pivoted upon ashoulder screw 114 on the side 13 of the machine frame and locatedoutside thereof. Lever 113 is normally maintained in a vertical positionso as to disengage arms 97 and 98 from the dials, by two pivoted dogs115 and 116 (see Fig. 15) which bear, under the tension of a spring 117,againstopposite sides of a sleeve v .118 on ashoulder screw 119 on lever113 and extending through an opening 120 in Dogs 115 and 116 are pivotedon the inside of the side 13 of the machine frame.

the machine frame and are limited in their movement toward each other-bystatronary stop bar 121. lit' will be seen from this convstruction that.

lever 113 may be shifted in either direction, but each time against. thetension of spring 117 which, when the lever lever 97 mayv be brought 7with pins 99 of dials 29. dial shaft there'is a pinion 94,

the. same shafts.

a shiftable bar 103, said screws pass- .ing through slots 104 in therack 101 to flanges 107 and 108 mechanism is projof the" machine frame.

Shaft 132 is rotated against the tension and 3). Lever 110 is connectedby [138 (see Fig. 20) is is released, will return it to the central ornormal position.

By shifting lever 113 backward, arms 98 may be brought into operativerelation with pins 100 of the dials 27, or by shifting said forward ortoward the operator, arms into operative relation To reset dials 28,arms 98 are brought lnto position'to operate upon pins 100 of dials 27,since dials 27 and 28 are fast upon Afterthe arms 97 or 98 areshifted-into operative relation with their respective. dials asdescribed, the dials are brought to their normal positions by theangular. movement of said arms which in turn, is effected throughtherotation of gears 94 by the shifting of rack 101.- This. shifting isef fected through the operation of a train of gearingcomprising,--among' others, agear 122 meshing with "edge of bar 101. ashoulder screw teeth 123 out on the lower Gear 122is rotatable on 124carried by a downward extensionof bar 103. Gear 122 meshes with a broadpinion 125 which is mounted fast upon a shaft 128 and 129 secured toopposite sides. of the machine frame.v Also fast. on shaft 126 126journaled in a sleeve 127 supported'in transverse supporting bars is amiter pinion 130'which meshes with a miter; gear 131- fast on arock-shaft 132 journaled in the frame sides 13 and 14;

Pinion shifting of gear 122 parallel to the axls 125 is broad enough toallow the 1 of said pinion soas to bring reset arms 97 or 98 intooperative relation with theirrespective dials without disengaging gear122 i from pinion 125.

. Shaft 132 is at all times under tension of a coil spring 133 securedat one end to the shaft, and at 'its other end to the side 13 (See Fig.25).

of this spring, to' reset the dials, by a reset lever134 fast on one endofsaid shaft and outside of the outer casing of the machine, said leverbeing normally held by spring 133 against a stop-pin 135.

The full forward movement of reset lever 134 is limited by a stop 136-on the outer casing of the machine.

resetting the complementary or division dials to zero, this forwardmovement of the lever 134 should be only nine-tenths of its fullmovement. For this purpose there is provided an auxiliary on the outercasing of the machine, arranged to stop the reset lever,

nine-tenths of its forward stroke, and, there- (See Fig. 14 Instationary stop .137

when desired, at

fore, before it reaches stop- 136. This is effected by causing auxiliarystop 137 to engage witha movable stop pin 138 carried by thehandle 139of the reset lever. Stop formed on one end of to the 77 acting throughlever 68,

' a slot 113 in said lever.

a'plunger rod 140, the other end of which of said chamber, as a. stop,by spring 145 in chamber 144, said spring tending at all 3 times to drawpin 138 into'the handle-and out of the path of stop 137.

en it is desired to have reset lever 134 stop at nine-tenths of its fullstroke to reset the complementary or division dials, the

operator presses on the end of" cap causing pin 138 to protrude from thehandle so as to engage auxiliary stop 137. i

Before the dials can be reset, ,it is necessary to unlock the stopratchets 67 by withdrawing the nose 71 of each stop lever 68 from itsratchet. For this purpose the following mechanism is provided, (seeFigs. 3, 15 to 19, and 22 and 23) Lever 113 is'provided with anextension 146-having a beveled portion 147 (Fig. 16) adapted tov engagea beveled end 148 of a longitudinally slidable bar 149 supported neareach end upon shoulder screws 150 (see Figs. 22 and 23) carried. by atransverse stationary bar 151 secured at its ends sides of the machineframe, said shoulder screws extending through slots 152 in bar'149 topermit the latter to slide longitudinally. Bar 149 is provided with aseries of downward extensions or lugs 153, one for each dial shaft, andeach of these extensions carries a pin 154 adapted to engage eachtheforward edge of one of the levers 78. Therefore, when lever 113 isshifted backward to couple gear 94 with-the dials 27, cam 147 on saidarm will shift bar 149 to the right (Fig. 16) and this in turn willcause pins 154, acting upon levers 78 to rotate sleeve 69 in a clockwisedirection, which will withdraw the noses of all the stop" levers 68 fromtheir ratchets 67 and thus set the dial shafts free to rotate forresetting.

Lever 113 is prevented from springing outward by a fixed shoulder screw113* (see Figs. 15 and 18) which passes through Bar 149 is returned tonormal by springs sleeve 69, arms 78, and pins-154. Springs 77 at thesame time return stop levers 68 to their normal positions.

For the purpose of preventing overthrow of the dial shafts in resetting,mechanism is provided for throwing stoplevers 46 into locking relationwith stop ratchets 47 when reset lever 134 is operated. Levers 46 arethus operated by a series of pins 155, one

for each lever 46 carried by a bar 156- mounted to slide longitudinallyupon shoulder screws .157 secured to frame plate 11 shaft 160 to whichis to the left (Fig. '22) to'send stop levers 46into locking relationand dials an arm 159 fast at its lower end on a rock 161. Fast on shaft132'is an am 162 so positioned that before reset lever 134 has reachedthe end of dials, arm 162 wil rotate it. downward, thereby rotatingshaft 160 and causing arm 159 to move bar 156 which causes pins155 withstop ratchets 47.

Bar 156 remains shifted, 'as above described, until it is returned bylevers 46 under the action of springs 43 (see Fig. 11).

It is desirable to have an extra dial shaft thereon for carrying only.For example, suppose the operator is adding two amounts, each containingas many figures as there are columns of keys on the machine, and the sumof the two amounts contains more figures than there are columns of keysor regular dial shafts. Obviously, some means must be provided forregistering the extra figure. For this purpose there is provided, amongother parts, an extra multiplication and addition dial .27", an extratotaling dial 29 and an extradial shaft 23 therefor provided withcarrying mechanism,'substantially the same as that of the other dialshafts, adapted to be operated by the next dial shaft 22 on its right.The shaft 23, however, has no corresponding column of keys and istherefore provided with no mechanism for direct key operation., Thedials 27 and 29 are similar in construction and are mounted similarly todials 27 and 29, respectively, and are reset in the-same way as'theother dials. vShaft 23, however, carries no complementary dial, thecoupling of dial 29 to said shaft being effected through a collar 28fast on said shaft and provided with teeth 81 adapted to engage withteeth 80 on the sleeve hub of dial 29. (See Fig. 7.)

For use in performing the operation of division, this machine isprovided with a quotient counter or register having a key or key barlocated directly on the keyboard of the machine, and which forms a partof said keyboard. This key bar in turn operates a series of counterwheelswhich display the numbers of the quotient on the keyboard so as tobe readily viewed by the operator.

The mechanism of this counter is shown in detail in Figs. 26 to 33,inclusive, and comprises, in the case'shown, a series of five counterwheels 163, each having ten teeth, and the back of each tooth bearing anumber, these numbers running from zero to nine, inclusive. These wheelsare all mounted side by side to turn on a co mon shaft 164 mountedrigidly on the supporting plate 165 made fast to side 14 of its travelto reset the. l engage am 161 and also made fast an arm is mounted acoil spring 167 attached at its' inner end to shaft 164-, and at itsouter end to its counter wheel. Also rigidly attached 1 to each counterwheel is a stopdisk 168,

eaohhaving a lug 169 which in the normal or zero position of eachcounterwheel is adapted to engage with a stationary lug or bar 17 on themachine frame. The. tension of'tlie springs 167 is such as to tend torotate Fig.'" 29, so as. normally to hold lugs 169 .agrinst stop-170.-These counter-wheels are rotated stepby step each by an individualactuating pawl 171, and thesepawls are respectively pivoted to fiveslides 172' supported upon pins .17 3 and 174 attached rigidly to barthrough slots 175 and 17 6 in the said slides.

plate 165, andextending The pawls 171 are yieldable awayfrom the counterwheels against the tension ofindi-' vidual springs 177 which normallyhold them in the horizontal position shown in I Fig. 29, each of saidpawlsbeing provided its. slide,

. site pawls 171 is a is under pressure downward of an 1nd1v1d--- ualspring 188,

at its rear end with and thus limit vthe movement of the pawls 171towardthe counter wheels.

'Each counter wheel is provided with a Y holding pawl 180, ,pivotallymounted upon 3'5 pawl is a stud-shaft 180 'fast to plate 165, and eachyieldable away from said wheels against the tension of individualsprings 181. 'Pivoted to each slide 172 at its end oppolatch 182, eachof which the upward movement of each of these latches being limited by ashoulder 18 1 engaging slide. 4'5.

ing the. slides is an actuating These latches travel in vertical slotsin a fixed guide bar 182. Common to all of these latches, for thepurpose of operatbar 186 which forms a'right angle extension on an arm187 of a bell crank lever 188 pivotally mounted on an upward extensionof the plate 165. vA

similar bell crank lever Y 189 is pivotally mounted on an upwardextension of said plate, but is not provided with an actuating bar.Bell'crank lever 189 is, however, pro- -vided with a downwardlyextending guide arm 190 which moves between plate 165 and a guide plate165 secured to plate 165. Arm 18.7 is similarly guided by a plate 165*.Levers-51188 and 189 carry a key bar 191 fienibly mounted thereon, andthiskey bar is heldiii its normal position under the action ofgag spring192 attached at one end to the depending arm of lever 188, and at itsother end to plate 165.

For the purpose of raising latches -182 thecounter'wheels in a clockwisedirection,

a square shoulder 178 adapted to abut against a shoulder 179 on to nine,depending upon a shoulder 185 on its ting shaft 198,

nas eee' neath each of these latches a lifting cam,

said cams being indicated respectively by 'the numerals 193, 194, 195,-196 and 197, and

all mounted upon a shaft 198, rotatably journaled in supporting plate16.5; These cams are staggered angularly one-sixth of a circumferencearound the axis of their supporting shaft, and are fixed'in thisposition on' the shaft. Shaft 198 is rotated by a knob 199 fast thereon,and provided with six peripheral recesses 200, bearing numbers from zeroto five inclusive, and corresponding-in angular position to the settingposition of the five cams193 197 and a reset cam hereinafter referredto. p

If it is desired to operate the counter wheels; knob 199 is turned so asto display the numeral 1 on. top. This brings the setting'cam 197intothe position shown in Fig. 29, when its latch 182 will be raisedasslide to engage wlth its counter wheel and rotate the same one step,so as to display the numeral 1. Thecounter wheel corresponding-to thelatch 182 thus set, may be stepped around. any number of times up thenumber of strokes given the key bar. If it be desired to set up the nextfigure of the quotient, knob 199 is turned one step so as to bring thenext cam when it raises its corresponding latch 182 which may then beengaged by the actuating bar 186, and therethrough operate the nextcounter wheel in the series. }When the second latch is raised,howeverllthe first latch will descend out of operativ relation with theactuating bar, due to the rotation of its lifting cam 197. In a similarway all of the figures of a quotient may be set up on the counter wheel.

For the purpose of-resetting the counter 196 into the vertical position,

wheels to zero, there is provided a releasing slide 201, supported uponpins 173 and 174 passing through slots 202 arid 203 in said slide. Thisslide carries a cross-bar 204, fast reset slide is operated against thetension of a a spring 201 by a cam 205 fast on the setand so angularlydisposed thereon as to be a depending extension 206 of slide 201 on thesixth step of setting shaft 198. For the purpose of accuratelydividingthe movements of shaft 198 into six equal steps,

brought into action against the slde of the thin'meta'l, and thisoutercasing is provided through its top for hers 0111 the dials 27,

conform with the contour-of the said notches:

. en the setting shaft 198 is stopped in a position to reset the counterwheels, zero will bedisplayed on the top of actuating knob199. c Forxthepurpose of further preventing overthrow of knob 199 in turning it fromone set position to another, and also for the purpose of serving asamarker in connect1on with the figures on the knob, there may be provideda thumb stop 209 made fast to machine and extending over lrortion ofsaid knob;

he inn'encasing' or "frame of the machine is provided with a suitablebase 210 of wood,

'compositicn or'otberdesird material, and secured to the lower face ofthis base are a series of preferably rubber knobs 211 upon whichthemachine rests. (See Fig. 14). Y The entire inner casing or frame isinclosedflin an outer casing 212 preferably of 'wi th suitable openingsthelevers 85, 113, 188, 189. The top of this ycaslng' 'is also" providedwith rows of open- ]ingsj through which are displayed the num- 27, 28,,29 and 29 and iyalith 'an gated openingfor displaying a i-ioyv of ers ont quotient dials There may e'also SQCL-La'fid to the top of this outercasing two stationary finger pieces 113 and 113 for use in operatinglever 113.

This-arrangement contemplates the operation of lever 113 'by' placingone finger of the *tion of either finger :1 Also located on ed, on thecasing.

.l'eft hand. on either of the stops 113, or 113 and another finger on.the handle ofv lever 113, and forcing the, lever 113 in the direc piece113 or 113 ,v cording to the direction in which it is desired to operatesaid lever.

the top of the outer casing front of thekeys 1, are a series of pivotedJ decimal pointers 213, for each of whi h is provided a decimalpoint214, which ecimal points may be pins or 'merely dots paint- In additionto thedeclmalpoints 214, there may also be provided decimal indicatinglines 215. r Thereis also provided a pivoted decimal pointer 216 for thevquotient dials I Appearing on the top of this'outer casing to the leftof keys 1, and in horizontal alinement', respectively, with horizontalrows if said keys, exceptthev two upper-rows, are series of numbers .1to 8. These are the (tour plementary numbers; that is to'say, theyindicate which; of the horizontal rows of keys 1 shallrbe struck tosetup a number upon the complementary dials, and each of these numbers isthe complement on the basis of 9 of the number displayed on the key topsare adapted to engage one at a time with a-holdin'g spring 208bent to bmade in two sections 217 and 218, section covering 'tends from line 218acting key operated machines,

column of digrt keys from the right,'strike a the same horizontal linetherewith] This;

arrangement is preferable to that commonly employed 7 where thecomplementary.- num- A ers are placed .on the same key't'ops as theregular numbers. It s more'tir less confus ing to have two sets ofnumbers on thesaine gkeys even if they are in different colors.

"numbers on this mapreferablyla different on the keys.

outer casing is The complementary ch1ne, hoWever, arecolor from thoseThe top of the preferably the former dials 27, 27, 28, 29,. 29% theirshafts and other inclosed mechanism forward of plate 11, whilesection-218exdividing-the two sectlons rearward to the line'218 (See Fig. 1.)The rear end 219 of the outer casing is also preferably removable toafford ready access to ratchets 20 for adjusting the tension of themaster rock shafts. p Casing sections 217,- 218 and219 are provided withflanges 220, 221 and 221", respectively, which fit over an extension orflange 212 (see Fig." 21) soldered or otherwise made fast to the sidesof the casing, and rests, upon the edge of said sides.

By having the casing removable in sections, access to parts of themachine may be had without removing'the whole casing of the Whol topthereof. F or example, by e tion 21-7 alone, access may be.v 11 shaftunits and the parts for ward e, t-late 11 without disturbing any otherparts of the machine. WVith casing section 217 removed, any of the dialshaft 'units'may be readily lifted from the ma-. chine, repaired and putback, or replaced by others; 1 The procedure in performing the operationof addition and multiplication of this machine does notdilferessentiallyfrom 4 that employed in operating other direct.

so need not. The digitkeys here be goneinto in detail. are merely struckaccording to the amounts, and theresults'a're registered on the dials27.

One way of. performing the operation of subtraction on this machine isas follows:-

Let it be required .to subtract 254,236 from 738,625. First set thecomplementary dials. 28 to zero. This is done by shiftinglever 113 tocouple the dial shafts to the reset.

' mechanism and then pulling reset lever vforward or toward the operatornine-tenthsof a stroke,' in which case cap 141 of the rest lever handle.is pressed so as tocause stop pin 138 of said handle to protrude there?from. "Then, commencing with-the sixth. one key in eac column proceedingfrom left to right, the numbers of the keys struck in. the respectivecolumns corresponding to, complementary numbers 738,624 appearmg-v onthe top of the machine to the left of the r

